EP2401197B1 - Device with counter-rotating propellers having a means for changing the pitch of the propellers - Google Patents

Device with counter-rotating propellers having a means for changing the pitch of the propellers Download PDF

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Publication number
EP2401197B1
EP2401197B1 EP10706211.9A EP10706211A EP2401197B1 EP 2401197 B1 EP2401197 B1 EP 2401197B1 EP 10706211 A EP10706211 A EP 10706211A EP 2401197 B1 EP2401197 B1 EP 2401197B1
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EP
European Patent Office
Prior art keywords
propellers
actuator
planet carrier
gear train
energy
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Active
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EP10706211.9A
Other languages
German (de)
French (fr)
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EP2401197A1 (en
Inventor
Wouter Balk
François Gallet
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Safran Aircraft Engines SAS
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SNECMA SAS
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Publication of EP2401197A1 publication Critical patent/EP2401197A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
    • B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
    • B63H5/08—Arrangements on vessels of propulsion elements directly acting on water of propellers of more than one propeller
    • B63H5/10—Arrangements on vessels of propulsion elements directly acting on water of propellers of more than one propeller of coaxial type, e.g. of counter-rotative type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H3/00—Propeller-blade pitch changing
    • B63H3/06—Propeller-blade pitch changing characterised by use of non-mechanical actuating means, e.g. electrical
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H3/00—Propeller-blade pitch changing
    • B63H3/06—Propeller-blade pitch changing characterised by use of non-mechanical actuating means, e.g. electrical
    • B63H3/08—Propeller-blade pitch changing characterised by use of non-mechanical actuating means, e.g. electrical fluid
    • B63H3/081—Propeller-blade pitch changing characterised by use of non-mechanical actuating means, e.g. electrical fluid actuated by control element coaxial with the propeller shaft
    • B63H3/082—Propeller-blade pitch changing characterised by use of non-mechanical actuating means, e.g. electrical fluid actuated by control element coaxial with the propeller shaft the control element being axially reciprocatable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C11/00—Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft
    • B64C11/30—Blade pitch-changing mechanisms
    • B64C11/306—Blade pitch-changing mechanisms specially adapted for contrarotating propellers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C11/00—Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft
    • B64C11/46—Arrangements of, or constructional features peculiar to, multiple propellers
    • B64C11/48—Units of two or more coaxial propellers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D35/00—Transmitting power from power plants to propellers or rotors; Arrangements of transmissions
    • B64D35/04—Transmitting power from power plants to propellers or rotors; Arrangements of transmissions characterised by the transmission driving a plurality of propellers or rotors
    • B64D35/06—Transmitting power from power plants to propellers or rotors; Arrangements of transmissions characterised by the transmission driving a plurality of propellers or rotors the propellers or rotors being counter-rotating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D7/00—Rotors with blades adjustable in operation; Control thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D27/00—Arrangement or mounting of power plants in aircraft; Aircraft characterised by the type or position of power plants
    • B64D2027/005—Aircraft with an unducted turbofan comprising contra-rotating rotors, e.g. contra-rotating open rotors [CROR]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F01D15/12—Combinations with mechanical gearing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2220/00—Application
    • F05D2220/30—Application in turbines
    • F05D2220/32—Application in turbines in gas turbines
    • F05D2220/324—Application in turbines in gas turbines to drive unshrouded, low solidity propeller
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T50/00—Aeronautics or air transport
    • Y02T50/60—Efficient propulsion technologies, e.g. for aircraft

Definitions

  • the subject of the invention is a contra-rotating propeller device having a pitch changing means of the propellers, supplied with energy, most often oil that can be pressurized, the means then being a hydraulic cylinder.
  • Counter-rotating propeller devices are already known in several aircraft models and are appreciated since they provide fuel savings. Some include variable pitch propellers and ways to change pitch. Such a device is known to GB 2 209 371 , which is considered the closest prior art and describes the features of the preamble of claim 1.
  • a difficulty then consists in conveying the energy to the actuators in a suitable manner, since the unoccupied volume is small and since the device comprises sets of parts rotating at different speeds that must be crossed. This problem remains with transmissions in the form of epicyclic train, for distributing the energy of a turbine between the two drive shafts of the propellers while providing the opposite rotations in the desired gear ratio.
  • the actuator may be placed near the propellers in a cavity surrounded by the two drive shafts.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Retarders (AREA)
  • General Details Of Gearings (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Description

Le sujet de l'invention est un dispositif à hélices contrarotatives ayant un moyen de changement de pas des hélices, alimenté en énergie, le plus souvent de l'huile pouvant être mise sous pression, le moyen étant alors un vérin hydraulique.The subject of the invention is a contra-rotating propeller device having a pitch changing means of the propellers, supplied with energy, most often oil that can be pressurized, the means then being a hydraulic cylinder.

Des dispositifs à hélices contrarotatives sont déjà connus dans plusieurs modèles d'aéronefs et sont appréciés puisqu'ils permettent des économies de carburant. Certains comprennent des hélices à pas variable et des moyens pour modifier le pas. Un tel dispositif est connu de GB 2 209 371 , qui est considéré comme l'art antérieur le plus proche et décrit les caractéristiques du preambule de la revendication 1. Une difficulté consiste alors à acheminer l'énergie aux actionneurs de façon convenable, puisque le volume inoccupé est peu important et puisque le dispositif comprend des ensembles de pièces tournant à plusieurs vitesses différentes qu'il faut traverser. Ce problème reste présent avec les transmissions se présentant sous forme de train épicycloïdal, permettant de répartir l'énergie d'une turbine entre les deux arbres d'entraînement des hélices tout en assurant les rotations contraires dans le rapport de vitesse voulu. L'actionneur peut être placé à proximité des hélices, dans une cavité entourée par les deux arbres d'entraînement. Il est tentant de faire passer les canalisations d'énergie dans cette cavité centrale du dispositif, le long des arbres d'entraînement, à travers le train épicycloïdal et le long d'un autre arbre creux, lié à la turbine à basse pression et soutenant le train épicycloïdal en l'entraînant; et de prolonger cette canalisation, située dans l'axe de rotation du dispositif, par une canalisation fixe et coudée prenant une direction radiale à travers la turbine. Ce dispositif serait particulièrement simple, mais il a été constaté que le passage de l'huile à travers la turbine très chaude était susceptible de produire une cokéfaction nuisant à la performance de l'actionneur.Counter-rotating propeller devices are already known in several aircraft models and are appreciated since they provide fuel savings. Some include variable pitch propellers and ways to change pitch. Such a device is known to GB 2 209 371 , which is considered the closest prior art and describes the features of the preamble of claim 1. A difficulty then consists in conveying the energy to the actuators in a suitable manner, since the unoccupied volume is small and since the device comprises sets of parts rotating at different speeds that must be crossed. This problem remains with transmissions in the form of epicyclic train, for distributing the energy of a turbine between the two drive shafts of the propellers while providing the opposite rotations in the desired gear ratio. The actuator may be placed near the propellers in a cavity surrounded by the two drive shafts. It is tempting to pass the energy pipes in this central cavity of the device, along the drive shafts, through the epicyclic train and along another hollow shaft, connected to the low-pressure turbine and supporting the epicyclic train by driving it; and to extend this pipe, located in the axis of rotation of the device, by a fixed pipe and bent in a radial direction through the turbine. This device would be particularly simple, but it was found that the passage of the oil through the very hot turbine was likely to produce coking adversely affecting the performance of the actuator.

On préconise donc ici un autre moyen d'alimentation de l'actionneur en énergie, qui soit dépourvu de cet inconvénient. Sous une forme générale, l'invention est relative à un dispositif à hélices contrarotatives, comprenant un moyen de changement de pas des hélices et une transmission à train épicycloïdal entre une turbine d'entraînement et les hélices, le moyen de changement de pas comprenant un actionneur alimenté en énergie et logé dans une cavité entourée par des arbres concentriques reliant le train épicycloïdal aux hélices, ainsi qu'un système d'acheminement de l'énergie d'un stator à l'actionneur, caractérisé en ce que le système d'acheminement comprend un conduit d'alimentation traversant un carter fixe du stator, le carter fixe s'étendant entre la turbine et le train épicycloïdal, puis un joint dynamique entre une extrémité du conduit et un collecteur circulaire tournant, et enfin des conduits de commande reliant le collecteur à l'actionneur, lesdits conduits de commande traversant un porte-satellites du train épicycloïdal.It is therefore recommended here another power supply means of the actuator, which has no disadvantage. In a general form, the invention relates to a device with contra-rotating propellers, comprising a means for changing pitch of the propellers and an epicyclic gear transmission between a drive turbine and the propellers, the step change means comprising a an actuator fed with energy and housed in a cavity surrounded by concentric shafts connecting the epicyclic gear to the propellers, and a system for conveying the energy of a stator to the actuator, characterized in that the system of routing comprises a supply duct passing through a stationary casing of the stator, the fixed casing extending between the turbine and the epicyclic gear train, then a dynamic seal between one end of the duct and a rotating circular collector, and finally connecting control ducts. the collector to the actuator, said control lines passing through a planet carrier of the epicyclic gear train.

Ces aspects de l'invention, ainsi que d'autres, seront maintenant décrits plus en détail au moyen des figures suivantes :

  • les figures 1 et 2 illustrent deux vues du dispositif à hélices, sans représentation de l'invention,
  • les figures 3 et 4 détaillent les caractéristiques de l'invention,
  • la figure 5 représente une variante de réalisation.
  • et la figure 6 est une vue en isolé du moyeu porteur des hélices.
These and other aspects of the invention will now be described in more detail by way of the following figures:
  • the figures 1 and 2 illustrate two views of the propeller device, without representation of the invention,
  • the figures 3 and 4 detail the features of the invention,
  • the figure 5 represents an alternative embodiment.
  • and the figure 6 is an isolated view of the propeller hub.

On se reporte aux figures 1 et 2. Le moteur dont l'invention fait partie comprend deux hélices 1 et 2 disposées successivement et tournant autour d'un même axe X. L'hélice amont 1 est montée sur un premier arbre creux 3 et l'hélice aval 2 sur un deuxième arbre creux 4. Le premier arbre creux 3 est en appui sur un carter statique 5 par une paire de roulements 6 et 7 au-delà desquels il s'épanouit en un manchon conique 8 et aboutit à une couronne 10 dentée intérieurement. Le deuxième arbre creux 4 est soutenu par le premier arbre creux 3 au moyen de deux roulements 11 et 12 et s'épanouit en un deuxième manchon conique 13, contenu dans le premier manchon conique 8 et qui est relié à un porte-satellites 14. Le porte-satellites 14 possède des roues dentées satellites 15 réparties sur un cercle et qui engrènent extérieurement avec la couronne 10 et, intérieurement, avec une roue planétaire 16. L'ensemble constitue un train épicycloïdal 17 qui est représenté à la figure 4. La figure 6 illustre le moyeu 51 porteur des hélices 1 et 2.We refer to figures 1 and 2 . The engine of which the invention is part comprises two propellers 1 and 2 arranged successively and rotating about the same axis X. The upstream propeller 1 is mounted on a first hollow shaft 3 and the downstream propeller 2 on a second hollow shaft 4. The first hollow shaft 3 is supported on a static casing 5 by a pair of bearings 6 and 7 beyond which it blooms into a conical sleeve 8 and leads to a ring gear 10 internally. The second hollow shaft 4 is supported by the first hollow shaft 3 by means of two bearings 11 and 12 and opens into a second conical sleeve 13, contained in the first conical sleeve 8 and which is connected to a planet carrier 14. The planet carrier 14 has planet gear wheels 15 distributed on a circle and which mesh externally with the ring gear 10 and, internally, with a sun gear 16. The assembly constitutes an epicyclic gear train 17 which is shown in FIG. the figure 4 . The figure 6 illustrates the hub 51 carrying propellers 1 and 2.

Une turbine à basse pression 18 est située de l'autre côté du carter statique 5. Elle comprend un troisième arbre creux, qui est un arbre de turbine 19 servant à la faire soutenir par le carter statique 5 à l'aide de deux roulements 20 et 21. L'arbre de turbine 19 s'étend jusqu'à la roue planétaire 16, qu'il soutient.A low pressure turbine 18 is located on the other side of the static casing 5. It comprises a third hollow shaft, which is a turbine shaft 19 used to support it by the static casing 5 by means of two bearings 20 and 21. The turbine shaft 19 extends to the sun gear 16, which it supports.

Le deuxième arbre creux 4 enferme une cavité 30 par laquelle passe l'axe X du dispositif. Cette cavité 30 contient un actionneur 31 de modification du pas des hélices 1 et 2. Il s'agit d'un par exemple d'un vérin hydraulique alimenté en huile; il pourrait s'agir d'un autre type d'actionneur (moteur électrique par exemple), alimenté en un autre moyen lui apportant l'énergie nécessaire à sa fonction (par exemple : électrique). L'actionneur 31 est ici un vérin double pour commander séparément les pas des hélices 1 et 2. Des vérins de ce genre sont connus, ainsi que les transmissions nécessaires pour fournir leur puissance non seulement à la deuxième hélice 2, solidaire du deuxième arbre creux 4 qui entraîne aussi en rotation le vérin 31, mais à là première hélice 1 qui tourne en sens opposé, et ne seront pas décrits davantage. La cavité 30 s'étend non seulement dans les arbres creux 3 et 4, mais à travers le train épicycloïdal 17 et l'arbre de turbine 19, qui soutient la roue planétaire 16. Il est naturel, et il a déjà été envisagé, de faire passer les canalisations d'alimentation de l'actionneur axialement par la cavité 30. Elles comprendraient alors une canalisation d'alimentation 45 essentiellement radiale, traversant un bras 32 de stator 33 entre deux parties de la turbine 18, et comprenant un coude 46, puis, au-delà d'un joint dynamique 47, une canalisation de commande 48 menant à l'actionneur 31 et d'axe X. Le joint dynamique 47 ne se situe pas obligatoirement à l'endroit indiqué, il pourrait se situer plus près du vérin 31. Ainsi qu'on l'a mentionné, cette conception a l'inconvénient d'exposer l'huile à un échauffement important dans le bras 32.The second hollow shaft 4 encloses a cavity 30 through which the X axis of the device passes. This cavity 30 contains an actuator 31 for modifying the pitch of the propellers 1 and 2. This is for example a hydraulic cylinder supplied with oil; it could be another type of actuator (electric motor for example), powered by another means providing the energy necessary for its function (eg: electric). The actuator 31 is here a double cylinder for separately controlling the pitch of the propellers 1 and 2. Cylinders of this type are known, as well as the transmissions necessary to supply their power not only to the second propeller 2, integral with the second hollow shaft 4 which also rotates the cylinder 31, but the first propeller 1 which rotates in opposite directions, and will not be described further. The cavity 30 extends not only in the hollow shafts 3 and 4, but through the epicyclic gear train 17 and the turbine shaft 19, which supports the sun wheel 16. It is natural, and it has already been envisaged, to passing the supply lines of the actuator axially through the cavity 30. They would then understand a substantially radial supply pipe 45, passing through a stator arm 33 between two parts of the turbine 18, and comprising a bend 46, then, beyond a dynamic seal 47, a control pipe 48 leading to the 31 and X axis actuator. The dynamic seal 47 is not necessarily at the indicated location, it could be closer to the cylinder 31. As mentioned, this design has the drawback of expose the oil to a significant heating in the arm 32.

La figure 3 illustre la conception différente et proposée comme l'invention, d'après laquelle la canalisation d'alimentation 34 passe à travers le carter statique 5 en s'étendant en direction radiale. Elle s'interrompt près du train épicycloïdal 17 à une extrémité ouverte 35 qui débouche dans un collecteur 36 circulaire de section en auge d'un joint dynamique 50 qui comprend encore un flasque 37 d'appui contre le porte-satellites 14. Le collecteur 36 est donc fixé au porte-satellites 14 et tourne avec lui. L'huile rejetée par le conduit d'alimentation 34 séjourne dans le collecteur 36 avant que la pression de l'huile ne la fasse pénétrer dans le flasque 37 qui est creux, à double paroi. Des canalisations de commande 38 s'étendent entre le creux du flasque 37 et l'actionneur 31 en traversant le porte-satellites 14 et se rassemblent en arrivant au deuxième manchon conique 13 avant de rejoindre la cavité 30. Elles peuvent être au nombre de quatre, deux pour chacune des hélices 1 et 2, et pour l'aller et le retour de l'huile.The figure 3 illustrates the different design and proposed as the invention, according to which the supply line 34 passes through the static housing 5 extending radially. It interrupts near the planetary gear train 17 at an open end 35 which opens into a circular manifold 36 of section trough a dynamic seal 50 which further comprises a flange 37 bearing against the planet carrier 14. The collector 36 is therefore attached to the planet carrier 14 and rotates with it. The oil discharged through the feed duct 34 remains in the manifold 36 before the pressure of the oil makes it penetrate into the flange 37 which is hollow, double-walled. Control ducts 38 extend between the hollow of the flange 37 and the actuator 31 through the planet carrier 14 and collect on arriving at the second conical sleeve 13 before reaching the cavity 30. There may be four , two for each of the propellers 1 and 2, and for the going and the return of the oil.

Les canalisations de commande 38 passent à travers des perçages 39 et 40 qui sont établis soit dans des anneaux 42 constituant l'armature du porte-satellites 14, entre les satellites 15, soit à travers les axes 43 de soutien des satellites 15 par des paliers 44. La première construction est représentée aux figures 3 et 4. L'autre construction est représentée à la figure 5, où on voit que les canalisations de commande, maintenant référencées par 38', occupent une portion de la section des perçages 40 tout en permettant à un débit partiel d'huile d'arriver aux paliers 44. Les perçages 39 peuvent évidemment être omis alors.The control lines 38 pass through holes 39 and 40 which are established either in rings 42 constituting the armature of the planet carrier 14, between the satellites 15, or through the axes 43 of support of the satellites 15 by bearings 44. The first construction is shown in figures 3 and 4 . The other construction is represented at figure 5 , where it is seen that the control lines, now referenced 38 ', occupy a portion of the section of the holes 40 while allowing a partial flow of oil to reach the bearings 44. The holes 39 can obviously be omitted then .

On a décrit un actionneur 31 hydraulique alimenté en huile. Quoique l'invention soit particulièrement avantageuse alors, elle n'est pas limitée à ces actionneurs mais pourrait être appliquée par exemple à des actionneurs 31 électriques placés au même endroit, les canalisations hydrauliques constituant les conduits étant remplacées par des conduits d'énergie électrique représentés par des gaines rigides de câbles électriques et le joint dynamique 50 par un joint dynamique adapté, par exemple à brosse, le collecteur étant alors une piste conductrice circulaire sur laquelle frotte la brosse finissant le câble établi à travers le carter. La disposition générale du système ne serait pas changée.There is described a hydraulic actuator 31 supplied with oil. Although the invention is particularly advantageous then, it is not limited to these actuators but could be applied for example to electric actuators 31 placed in the same place, the hydraulic pipes constituting the conduits being replaced by electrical energy conduits represented by rigid sheaths of electrical cables and the dynamic seal 50 by a dynamic seal adapted, for example brush, the collector then being a circular conductive track which rubs the brush finishing the cable established through the housing. The general layout of the system would not be changed.

Claims (5)

  1. A device with counter-rotating propellers (1, 2), comprising a means for changing the pitch of the propellers and an epicycloidal gear train transmission (17), between a driving turbine (18) and the propellers, the pitch changing means comprising an actuator (31) supplied with energy and housed in a cavity (30) surrounded by concentric shafts (3, 4) connecting the epicycloidal gear train (17) to the propellers (1, 2), as well as a system for transporting the energy of a stator (33) to the actuator, characterized in that the transport system comprises a supply conduit (34) passing through a static case (5) of the stator, the static case extending between the turbine (18) and the epicycloidal gear train (17), and then a dynamic joint (50) between one end of the supply conduit and a rotating circular collector (36), and finally control conduits (38, 38') connecting the collector to the actuator, said control conduits passing through a planet carrier (14) of the epicycloidal gear train.
  2. The device according to claim 1, characterized in that the energy is electricity and the actuator is electric, the dynamic joint then being an electric joint, the rotating circular connector having a circular conductive track on which the end of the supply conduit rubs.
  3. The device according to claim 1, characterized in that the transport system further comprises lubrication conduits (51) extending from the circular collector to bearings (44) supporting toothed planetary wheels (15) on the planet carrier (14).
  4. The device according to claims 1 and 2, characterized in that the bearings of the planets comprise drill holes (40) through axes (43) established on the planet carrier, and the control conduits (38') extend through said drill holes.
  5. The device according to claim 1, characterized in that the control conduits (38) cross a ring (42) forming a framework of the planet carrier (14).
EP10706211.9A 2009-02-27 2010-02-25 Device with counter-rotating propellers having a means for changing the pitch of the propellers Active EP2401197B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0951259A FR2942615B1 (en) 2009-02-27 2009-02-27 DEVICE WITH CONTRAROTATIVE PROPELLERS HAVING A MEANS FOR CHANGING THE STEPS OF THE PROPELLERS
PCT/EP2010/052421 WO2010097440A1 (en) 2009-02-27 2010-02-25 Device with counter-rotating propellers having a means for changing the pitch of the propellers

Publications (2)

Publication Number Publication Date
EP2401197A1 EP2401197A1 (en) 2012-01-04
EP2401197B1 true EP2401197B1 (en) 2015-07-08

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EP10706211.9A Active EP2401197B1 (en) 2009-02-27 2010-02-25 Device with counter-rotating propellers having a means for changing the pitch of the propellers

Country Status (8)

Country Link
US (1) US8834119B2 (en)
EP (1) EP2401197B1 (en)
CN (1) CN102333694B (en)
BR (1) BRPI1008619B1 (en)
CA (1) CA2753045C (en)
FR (1) FR2942615B1 (en)
RU (1) RU2515954C2 (en)
WO (1) WO2010097440A1 (en)

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FR2946011B1 (en) 2009-05-29 2013-01-11 Snecma MOBILE ROLLER DEVICE FOR CONTROLLING THE ORIENTATION OF BLOWER BLADES OF A TURBOPROPULSOR
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US8834119B2 (en) 2014-09-16
RU2011139298A (en) 2013-04-10
CN102333694A (en) 2012-01-25
CA2753045C (en) 2016-05-03
FR2942615B1 (en) 2011-04-01
WO2010097440A1 (en) 2010-09-02
BRPI1008619A2 (en) 2016-03-15
CA2753045A1 (en) 2010-09-02
FR2942615A1 (en) 2010-09-03
RU2515954C2 (en) 2014-05-20
BRPI1008619B1 (en) 2020-10-06
CN102333694B (en) 2014-01-29
EP2401197A1 (en) 2012-01-04
US20110305575A1 (en) 2011-12-15

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